225249775 has 6 divisors (see below), whose sum is σ = 279309752. Its totient is φ = 180199800.

The previous prime is 225249763. The next prime is 225249839. The reversal of 225249775 is 577942522.

It is not a de Polignac number, because 225249775 - 2¹⁵ = 225217007 is a prime.

It is a super-2 number, since 2×225249775² = 101474922275101250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4504971 + ... + 4505020.

Almost surely, 2^225249775 is an apocalyptic number.

225249775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

225249775 is a deficient number, since it is larger than the sum of its proper divisors (54059977).

225249775 is an equidigital number, since it uses as much as digits as its factorization.

225249775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010001 (or 9009996 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 225249775 is about 15008.3235239650. The cubic root of 225249775 is about 608.4451803272.

It can be divided in two parts, 225 and 249775, that added together give a square (250000 = 500²).

The spelling of 225249775 in words is "two hundred twenty-five million, two hundred forty-nine thousand, seven hundred seventy-five".